Winter squash and Zucchini

Winter squash noun - Any of various plants of the species Cucurbita maxima and Cucurbita moschata producing squashes that have hard rinds and mature in the fall.

Zucchini and winter squash are semantically related. In some cases you can use "Zucchini" instead a noun phrase "Winter squash".

Zucchini noun - Marrow squash plant whose fruit are eaten when small.

Winter squash and zucchini are semantically related. You can use "Winter squash" instead a noun "Zucchini".